There's a Borderlands 2 badass and key editor along with skin unlocker that miraculously works for the pre-sequel. I don't think you can post links and sorry, I am unsure if I need to verify the link but I recommend the program, really helps easy. Just look for a youtube video named "Borderlands 2 - Badass Stat/Golden Key Editor【PC】" from youtuber Deftoned. Feel free to virus scan it. No it isn't mine, but it works well.

Edit: I don't know if I did anything against the rules by posting a third party application, so I apologize in advance if that isn't allowed.